epenthesis

noun

(भाषाविज्ञान) स्वरागम/व्यञ्जनागम

the insertion of a vowel or consonant into a word to make its pronunciation easier

the insertion of a vowel in the plural of the word `bush' is epenthesis
'bush' को बहुवचनमा स्वर थप्नु स्वरागम हो